1971 BSA Rocket 3
BIG CHANGES FOR THE 1971 BSA ROCKET 3
1971 was a watershed year for BSA and Triumph. The Big Twins (BSA A65 and Triumph Bonneville/TR6got all new frames, suspension, brakes, cycle gear and bodywork, a complete redesign with the exception of the engines, which carried over. The Triples got the same treatment, and benefitted from much the same hardware, with the exception of the frames, which also carried over.
1971 BSA ROCKET 3 FRAME COLORS
Early 1971-model BSA A65sand Rocket 3s came with dove gray frames (above). Not silver, mind you. Dove gray. Some people loved the look (me included), most hated it. It also showed off all those oil leaks. By the end of the 1971 model year, BSA had gone back to a more conventional black frame (below).
1971 BSA Rocket 3 SPECIFICATIONS
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Engine type Displacement Bore & Stroke Compression Ratio Intake Valve dia Exhaust Valve dia Carburetors Bore size Main Jet size Needle Jet size Needle type Needle position Throttle Valve Ignition System Spark Plug type Spark Plug gap Electrical System Charging System Primary Drive Clutch Gearbox Internal ratios 1st Gear 2nd Gear 3rd Gear 4th Gear Wheelbase Overall length Overall width Overall Height Ground clearance Seat Height Unladen weight Engine weight, dry Fuel Capacity Brakes, F/R |
OHV air-cooled inline 3 741cc / 45 cu.in. 62mm X 70mm / 2.67″ X 2.751″ 9.0:1 38.9mm / 1.53″ +/- 33.3mm / 1.31″ +/- 3- Amal Type 626 Concentrics 27mm 150 .106 STD 2 3-1/2 Breakers & Coils 3- Champion N3 .020″ / .50mm 12 volt DC Lucas 7CA alternator Triplex chain Single-plate, dry, diaphragm-type 4-speed, constant-mesh, sliding dogs —- 2.47:1 1.71:1 1.26:1 1.00:1 56.25″ / 142.875cm 86″ / 218.44cm 32.5″ / 82.55cm 43.5″ / 110.49cm 6.5″ / 16.51cm, unladen 32″ / 81.28cm 460 lbs / 208.8 kg 180 lbs / 81.72 kg 4.2 US gal / 3.5 Imp gal / 15.94 liters 8″ TLS drum / 7″ SLS drum |